Telephone system.



PATENTED SHPT. 11, 1906.

W. W. DEAN.

Duy Sm VI.D D nh M an m Th.0 Tv.. P lu fications may be made therein and still come 'rangernent and connections, I would have itunderstood thatit is not to be limited thereto, as various changes, alterations, and n1odiwithin its scope and principle, but

What I do claim, and desire to- Secure by Letters Patent, is-

- 1. The combination'w-ith a'telephone-line,

t of a polarized line signalingdevice and a battery at theoentral office connected in series in the line substantiallyas described.

2. The combination with a telephone-line, ofa polarized line-relay and a battery at the central office connected in Series in the line,

and a signal, controlled by said relay, substantially as described.

3. ,The combination with a telephone-line, ofapolarized line-relay and a battery per- I Inanently connected in series in the line and a signal controlled by said relay, substantially as described.

4. The combination with a telephone-line, of a olarized line -relay, a battery andan im e ance-coil in series in said line, substantia ly as described.

. 5. The combination with a telephone-line,

of a olarized line-relay, a battery and an impe ance-coil permanently connected in se- .ries in the line, the battery being located between the relay and impedance-coihsubstam tally as described..

v 6. The combination with a telephone-line,

I of a polarized line signaling device and a battery at the central oiiice connected With the line, and means to render said device inoperative when a connection is established with.

the line and to maintain the same`inopera- 'tive as long as the connection exists.

7.- The combination with a telephone-line, of a polarized line signaling device and a battery permanently connected with the line, and means to render said device inoperative when a -connection is established with the line and to prevent its operation during the connection.-

8. The combination with a telephone-line, a polarized line si `naling device, and a batifery at the centra office in series in the line,-

"and means to render the said device inoperative when a connection is established with the line.

9.- The combination with a telephone-line,

of a polarized line`signaling device and a battery permanently connected in series in the line and means to render the said device inoperativ`e when a connection iS' established with the line.'

10. The combination with a telephone-line, Of, a polarized line-relay and a battery permanently connected in series in the line and. means to rendersanzl relay lno erative when a'connection is established wit the line.`

11. The combination with a telephone-line, of apolarized' line'signaling device and a bat"- tery connected therewith, and means to reverse the Current through said device when a connection is established With the line, substantially as described.:

12. The combination with attelephone-line, of a polari-zed line signalingdeviceand abattery in series in the line, an'd means for reversing the current through the signaling .de-

vice when a connection is established with the line, sbstantially asdescribed 13'. The combination with a telephone-line, of a polarizedline signaling device and a battery permanently connected in: series in'the line, and means for reversing currentthr-ough when. a connection is established with the line substantially as deser-bedL of a polarized line signaling device and albattery in the line, a cord-circuit, asecond battery, connected with said circuit and means for diverting the current r'rom the irstnamed battery from the line-relay and sending current in the reverse direction through said relay from the second battery When a connection is established with the line, sub

stantially as described.

15. The combination with a telephone-line, of an operator's cord connector, apolarized spervisory signaling device associated therewith, a battery in a bridge of the cord-cn'- strandof the cbrd-cirouit and a battery between the strands to charge the s ubstationtrarismitters, the said relaybein unresponoperating the said relay when the line iS' opened.

18. The combination with 8: telephone-hue,

of a polarized line-relay and a battery in se'- .polarized supervisory rel ay and" a second' battery connected with said 'ircuit and means for rendering the relays unresponsive when a connection is established and' the subscriber's line is closed and' for r`enderingthe supervisory relay responsive when the inc is ope`n. 19. The combination with atel 'ephone-lme of a Cord-circuit, a polarizedsupervisory relay associated with said circuit and means to send current through the samein one direc- 'tion Wlill` a Connection J'LS established With the device to render the same inoperative cuit, and means to prevent the* operation of ries 1ri the line, an opera'tr's cord-circuit, a

14. The combination with a telephone-line,

sive to the charging-current, an "means for 4 IIS in the reverse directionWhen the subseribefs,

- line isclosed, substantially as described.

- circuit, a

20. The combination with a telephone-line, ofa cord-circuit, a polarized supervisory relay associated with said circuit and a battery connected therewith, means for sending current from said battery through the said relay' III, one direction when the subscribefs line is closed and in the reverse direction when the line 18 opened, substantially as described.

v 21; The combination with a telephone-line, an. operator s cord-circuit connected therewith, a polarized stipervisory signaling device and a battery in the circuit, means for sending current through said device in one direct1on during conversation, and means for revers1ng the current through said device when the suleseribefs telephone isnot in use, wherehy said device indicates the condition of the hne during a connection, substantially as deseribed.-

22. The combination with a telephone-line, of a polarized line-re'lay, a cord-cirCuit,- a po larized supervisory relay, means for sending currents throu h said relays when a connection is estabished with the line to render the line relay inoperative` "and the superv1soryrelay operatrve or inoperative according as the telephone-line is open or closed.

' 23. The combination with a calling telephone-line, of a polarized line-relay, acordolarized supervisory relay connected wit the said circuit and means for sending reversing-current through both said relays when a connection is established with the line, whereby both are rendered inoperativer 24:. The combination with a calling telephone-line, of a polarized line-relay, a cordcircuit, a polarized supervisory relay in said circuit, means for sending reversing-current through said line-relay -and charging-current in an unresponsive direction through said supervisory relay to the Substation of the line:

2.5. The combination with an idle telehone-line, of a olarized line-relay in the inc, a cord-circurt, a polarized supervisry relay in said circuit and means for sending current in an unresponsive direction through said line-relay and in a responsive direction through said supervisory relay when a connection is established with the line.

26. The combination with a telephone-line, of a central battery for said line, a polarized line-relay responsive to continuous ourrent in the line in one direction wn'en the subscriber is calling the central oflice, and means for including -said battery and line-relay ina local circuit to send current therethrongh in an nnrespensive direction when a connection is established with the line to render said relay inc erative as lon as the connection exsts, su stantially as escribed.

27. The combination with a telephone-line, of a polarized hne-relay responsive tocontrnuous current'm the line in one direction when the Subscriber is calling the ce`nt'raloffice, a cord-circuit, a battery connected'with said circuit, and means for inclur lin'g Said' battery and l1ne-relay In circui.t to s endvotirrent in an unresponsive di.rection through. said relay when a connection IS established with the line and during the connection,

stantially as described. H, 28. The combination with a telephone-line,

of a cord-circuit, a polarized supervisory re lay in said circuit, a battery, a local circuit containing said relay and said battery croiripleted when a connection is established with the line, and means for causing curr`eritto flow in said-local circuit to operate the relay when the telephone-line is open.

29. The combination with a telephone-line,

of a line-relay and battery in the line, a cordcircuit, a supervisory relay and a battery connectedwith the cord-circuit, and means for connecting the two relays and the two batteries in series ina local circuit. when the i cord-circuit is connected with thelinei 30. The combination with a telephone-line, of a olarized line-relay and battery permanent the circuit, and means for connecting Said line-relay in a local circuit with the coI-'d-cireuit battery and both relays and both batteries in a 'second local circuit, when a connection is established with the line.

31. The combination with a telephone-line, of a line-relay and a battery connected therewith, a coid-circuit connected with the line, for conversational purposes, a supervisory relay and a second battery in said circuit, said batteries being adapted to both charge the tele bene-line when the line is closed and to bot send current through said relays when in series inthe line, a cord-cireuit, a. polarized superv1sory relay and a batteryin the line is open, the supervisory relay being responsive and the hne-relay unresponsrve to such current. c

82. The combination with a telephone-imc, of a polarized line-relay and a battery in se- -riesin the lille, a cord-circuit, a polarized superv1sory relay 'ni'one strancl. thereof, and a- IIO telephone-lines, of Operators cord-circuits,

and a battery, a portion of said. battery being common to the telephone-lines and another portion common to the cord-circuits, and polarized line and supervisory relays, associated respectively with the telephone-lines and cord-circuits.

35. Ina telephone syste1n, the combination with a telephone-line, of a polarizedline signaling device connected with the line at the central oflice responsive to continuous current over the line in one direction' wl1en the sulescriberis calling the central ofiice, and means when a connection is established with the line in res onse, to the call for sending current throng said device in the reverse direction to render the same inoperative and to maintain it inoperative durin the connection, substantially as described 86. In a telephone-exchange system, a subscriber s station and a central station and a line-circuit interconnecting them, a source of current connected to the line, and a signalmagnet connected to said source at a point intermediate its terminals, so as to divide it, together with means controlled by the suhscriber to close a circuit through the signalmagnet and one side or d.ivision ofthe source, and means und.er the control of the central oilice to close a circuit through the magnet and the other side or division of the source, whereby t he signal may be controlled and restored as desired.

87. In a telephone system, a subseriber's station and a central station and. a metallic circuit connecting them, a source of current bridged across the metallic circuit at the central station and means at the subscriloer's sta- `tion to determine the flow Of current therefrom In the line, a signal-magnet connected the subseriber s station to determine the flow 'the source of current in a circuit from one side of the line to a point of supply .intermediate of the torminals of said source, a connection Trom one terminal of' the source to the other side of line, and means operablein making connection with the line to connect the other terminal of the source to the first side Of line on the jack side of the signal-magnet, together with means at the subseriloer s station to close the sides of the'linetogether in the use of his telephone, whereley the potential dillerence at the terminals of the polarized signal-magnet rnay be reversed atwill, substantially as described.

39. In a telcphone-exchange system, a sub- Scriber s line, a centralized source of current connected to line, an operator's connective circuit, a polarized signal-magnet connected between the source and line, and means where by an operator, in making connection with the line, may reverse the direction of current through the polarized signal-magnet without reversing that on the line, .substantially as described.

41). In a telephone system, a subscriber s line, a source of current, an operators connective circuit, a polarized signal-magnet connected between the line and source and a second polarizedsignal-magnet connected loetween the connective circuit and the source, together with means under the control of the subscriber to cause a flow of current from the source through the first polarized signal-magnet to set th.e same, means under the control of the operator to reverse the flow through the same to unset itand to cause a flow of current through the second polarized signalmagnet to set it, and means und.er the control of the Subscriber to reverse the direction of current-flow through the second polarized signal-magnet to unset it during use of the line, substantially as described.

In witness wlrereol I hercunto subseribe ruy name in the presence o'l two witnesses. WILLIAM. WV. DEAN. Witnesses:

J. (J. BICLD N,

v ROBERT Lawrs AMIGS. 

